用于从字符串中删除第 n 个字符的 Java 程序
可以使用该substring()函数删除字符串中的第n个字符。一个例子如下-
String = Happy The 3rd character is removed = Hapy
演示这一点的程序如下-
示例
public class Example {
public static void main(String args[]) {
String str = "Apple";
System.out.println("Original string: " + str );
System.out.println("String with 4th character removed: " + removeChar(str, 4));
}
public static String removeChar(String str, int n) {
return str.substring(0, n-1) + str.substring(n);
}
}输出结果Original string: Apple String with 4th character removed: Appe
现在让我们了解上面的程序。
该函数removeChar()从给定的字符串中删除第n个字符。这是通过使用函数的子字符串来完成的。然后返回剩余的字符串。演示这一点的代码片段如下-
public static String removeChar(String str, int n) {
return str.substring(0, n-1) + str.substring(n);
}在函数中main()，定义了字符串str。然后显示原始字符串，并通过调用显示修改后的字符串removeChar()。演示这一点的代码片段如下-
public static void main(String args[]) {
String str = "Apple";
System.out.println("Original string: " + str );
System.out.println("String with 4th character removed: " + removeChar(str, 4));
}